I have two questions about printing with PLA. They may or may not be related.
- At the beginning and end of every extrusion path, a bit of excess material gets printed. Here is an example of a C-shaped part with the random seam position selected.
The surface is supposed to be smooth. Is there a way to adjust the slic3r settings to change this? I have tried changing the retraction value, with no noticeable effect.
Selecting the aligned seam option results in so much excess material printing that it builds up in the Z direction, so tall and narrow parts like this one get knocked off the print bed.
- Every external corner prints excess material, so the corners are oversize. Here is an example.
This is a print of http://www.thingiverse.com/thing:38418. The external surfaces are flat in the .stl file, but are clearly not in this print. Although the look of this particular print was improved by oversize corners, I would like to learn a way to adjust this effect. Is there an adjustment for this?